#pragma once

#include <iostream>
#include <string>
#include <fstream>

class Util
{
public:
    static bool ReadFileContent(const std::string &filename, std::string *out)
    {
        //out->clear();
        // std::ifstream in(filename);
        // if(!in.is_open())
        // {
        //     return false;
        // }
        // std::string line;
        // while(std::getline(in, line))
        // {
        //     *out += line;
        // }

        // in.close();
        // return true;
        int filesize = FileSize(filename);
        if(filesize > 0)
        {
            std::ifstream in(filename);
            if(!in.is_open()) return false;
            out->resize(filesize);
            in.read((char*)(out->c_str()), filesize);
            in.close();
        }
    }

    static bool ReadOneLine(std::string &bigstr, std::string *out, const std::string &sep)
    {
        auto pos = bigstr.find(sep);
        if(pos == std::string::npos) return false;
        *out = bigstr.substr(0, pos);
        bigstr.erase(0, pos + sep.size());
        return true;
    }

    static int FileSize(const std::string &filename)
    {
        std::ifstream in(filename, std::ios::binary);
        if(!in.is_open()) return -1;
        in.seekg(0, in.end);
        int filesize = in.tellg();
        in.seekg(0, in.beg);
        in.close();
        return filesize;
    }

private:
};